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Right-of-Use Asset and Lease Liabilities - Supplemental Balance Sheet Lease Information (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Assets:    
Operating lease assets $ 18,008 $ 19,491
Finance lease assets 428 464
Total leased assets 18,436 19,955
Current    
Operating 5,594 5,515
Finance 175 183
Non-current    
Long-term lease obligations 15,609 17,202
Long-term lease obligations 258 282
Total lease obligations 21,636 23,182
Accumulated amortization 10,435 9,083
Accumulated depreciation of assets under finance leases $ 74 $ 28
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] Accrued expenses and other current liabilities Accrued expenses and other current liabilities
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other liabilities Other liabilities